[erlang-questions] Guards syntax for multiple values

[Frank Muller]

You’re probably new to Erlang.

You can achieve the same with parse_transform:
https://github.com/mad-cocktail/gin/blob/master/README.rst

There’s no point to add new syntax to the language.
/Frank

Hello everybody,
>
> I'm not very experimented in Erlang but I read carefully books and
> official documention.
>
> It seems to me that the guards syntax is not as good as it should be,
> i.e. too much verbose for multiple values.
>
> do(val1) -> val1;
> do(val2) -> val2;
> do(val3) -> val3;
> do(val4) -> val4;
> do(val5) -> val5.
>
> do(Val) when Val =:= val1; Val =:= val2; Val =:= val3; Val =:= val4;
> Val =:= val5 -> Val.
>
> It's boring and error prone to write.
>
> Has a "in tuple" syntax already be considered ? Something like :
>
> do(Val) when Val in {val1, val2, val3, val4, val5} -> Val.
>
> Cheers
>
> Florent
>
> --
> FLOSS Engineer & Lawyer
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